package thread;

public class demo18 {
    static class  Counter {
        private int count = 0;
        private Object locker = new Object();

        // public void add(){
        //     synchronized(locker){
        //         count++;
        //     }
        // }

        synchronized void add(){
            count++;
        }
    }
    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();

        Thread t1 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.add();
            }
        });
        Thread t2 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.add();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(counter.count);
    }
}
